svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.api / src / main / java / org / gvsig / fmap / dal / feature / FeatureAttributeDescriptor.java @ 44077
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2013 gvSIG Association.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 3
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | 40435 | jjdelcerro | package org.gvsig.fmap.dal.feature; |
25 | |||
26 | import java.text.DateFormat; |
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27 | |||
28 | import org.cresques.cts.IProjection; |
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29 | |||
30 | import org.gvsig.fmap.dal.DataTypes; |
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31 | import org.gvsig.fmap.geom.Geometry; |
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32 | import org.gvsig.fmap.geom.type.GeometryType; |
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33 | 44077 | jjdelcerro | import org.gvsig.timesupport.Interval; |
34 | 40435 | jjdelcerro | import org.gvsig.tools.dynobject.DynField; |
35 | import org.gvsig.tools.evaluator.Evaluator; |
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36 | |||
37 | /**
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38 | * A feature attribute descriptor contains information about
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39 | * one of the attributes in a feature, such as its name, data type
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40 | * or precision.
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41 | *
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42 | * @author gvSIG team
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43 | * @version $Id$
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44 | */
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45 | public interface FeatureAttributeDescriptor extends DynField { |
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46 | |||
47 | /**
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48 | * Returns a clone of this attribute descriptor
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49 | *
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50 | * @return FeatureAttributeDescriptor
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51 | * A new copy of this
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52 | */
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53 | public FeatureAttributeDescriptor getCopy();
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54 | |||
55 | /**
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56 | * Returns the name of this attribute's data type.
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57 | *
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58 | * @return
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59 | * a string containing the name of this attribute's data type.
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60 | */
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61 | public String getDataTypeName(); |
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62 | |||
63 | /**
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64 | * Returns a number that indicates the size of this attribute. See the
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65 | * documentation for the various constants of {@link DataTypes}
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66 | * for how to interpret this value. As an example, when the data type is
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67 | * {@link DataTypes#STRING}, this value indicates the maximum length of the string.
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68 | *
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69 | * @return
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70 | * an <code>int</code> indicating the size of the attribute.
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71 | */
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72 | public int getSize(); |
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73 | |||
74 | /**
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75 | * For attributes of type {@link DataTypes#DOUBLE} and {@link DataTypes#FLOAT}
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76 | * , this returns the maximum number of places after the decimal point. For
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77 | * other types, this must always return zero.
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78 | */
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79 | public int getPrecision(); |
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80 | |||
81 | /**
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82 | * For attributes of type {@link DataTypes#OBJECT},
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83 | * this returns the Java {@link Class} object that class or interface that
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84 | * all values of this attribute can be cast to.
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85 | */
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86 | public Class getObjectClass(); |
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87 | |||
88 | /**
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89 | * Returns the minimum number of occurrences of this attribute on a given
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90 | * feature. The vast majority of data sources and data consumers will only
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91 | * function with this value being zero or one. If the minimum number of
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92 | * occurrences is zero, this is equivalent, in SQL terms, to the attribute
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93 | * being nillable.
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94 | */
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95 | public int getMinimumOccurrences(); |
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96 | |||
97 | /**
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98 | * Returns the maximum number of occurrences of this attribute on a given
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99 | * feature. The vast majority of data sources and data consumers will only
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100 | * function with this value being one. A value of {@link Integer#MAX_VALUE}
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101 | * indicates that the maximum number of occurrences is unbounded.
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102 | */
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103 | public int getMaximumOccurrences(); |
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104 | |||
105 | /**
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106 | * Returns {@code true} if this attribute forms all or part of the unique identifying
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107 | * value for the feature it is contained by. The primary key attributes uniquely
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108 | * identify this feature from other features of the same type. This is different
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109 | * from the {@linkplain Feature#getReference()}, which must uniquely identify
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110 | * the {@link Feature} among all feature types.
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111 | */
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112 | public boolean isPrimaryKey(); |
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113 | |||
114 | /**
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115 | * Indicates whether this attribute accepts null values.
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116 | *
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117 | * @return
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118 | * true if this attribute can be null, false if not.
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119 | */
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120 | public boolean allowNull(); |
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121 | |||
122 | /**
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123 | * Returns an evaluator that will be used to calculate
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124 | * the value of this attribute
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125 | */
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126 | public Evaluator getEvaluator();
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127 | |||
128 | /**
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129 | * If this attribute is a {@link Geometry}, this method returns its
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130 | * Spatial Reference System.
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131 | *
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132 | * @return
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133 | * the SRS if this attribute is a {@link Geometry}, otherwise this method returns null.
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134 | */
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135 | public IProjection getSRS();
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136 | |||
137 | /**
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138 | * If this attribute is a {@link Geometry}, this method returns the specific
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139 | * geometry type,
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140 | * as defined in {@link Geometry.TYPES}.
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141 | *
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142 | * @return
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143 | * One of {@link Geometry.TYPES}
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144 | * @deprecated use {@link #getGeomType()} instead. To be removed in gvSIG
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145 | * 2.1.
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146 | */
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147 | public int getGeometryType(); |
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148 | |||
149 | /**
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150 | * If this attribute is a {@link Geometry}, this method returns the specific
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151 | * geometry subtype,
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152 | * as defined in {@link Geometry.SUBTYPES}.
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153 | *
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154 | * @return
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155 | * One of {@link Geometry.SUBTYPES}
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156 | * @deprecated use {@link #getGeomType()} instead. To be removed in gvSIG
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157 | * 2.1.
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158 | */
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159 | public int getGeometrySubType(); |
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160 | |||
161 | /**
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162 | * Returns the {@link GeometryType} of the attribute if it is a geometry.
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163 | *
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164 | * @return the geometry type
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165 | */
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166 | public GeometryType getGeomType();
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167 | |||
168 | /**
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169 | * If this attribute is of type Date, then this method returns
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170 | * the date format set by the data store.
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171 | *
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172 | * @return
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173 | * a date format
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174 | */
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175 | public DateFormat getDateFormat(); |
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176 | |||
177 | /**
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178 | * Returns this attribute relative position within the {@link Feature}.
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179 | *
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180 | * @return
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181 | * an index
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182 | */
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183 | public int getIndex(); |
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184 | |||
185 | /**
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186 | * Returns additional information of the attribute
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187 | *
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188 | * @return info
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189 | *
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190 | */
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191 | public Object getAdditionalInfo(String infoName); |
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192 | |||
193 | /**
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194 | * Returns if value is created automatically by the source
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195 | */
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196 | public boolean isAutomatic(); |
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197 | |||
198 | /**
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199 | * Gets if the attribute is a temporal attribute.
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200 | * @return
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201 | * <code>true</code> if is a temporal attribute
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202 | */
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203 | public boolean isTime(); |
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204 | |||
205 | 44077 | jjdelcerro | public Interval getInterval();
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206 | |||
207 | 41638 | jjdelcerro | /**
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208 | * Return true if the attribute has and index in the table.
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209 | *
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210 | * @return true if indexed.
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211 | */
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212 | public boolean isIndexed(); |
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213 | public boolean allowIndexDuplicateds(); |
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214 | public boolean isIndexAscending(); |
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215 | |||
216 | 40435 | jjdelcerro | /**
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217 | * Gets if the attribute has a {@link FeatureAttributeGetter}.
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218 | * @return
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219 | * a FeatureAttributeGetter or null.
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220 | 41335 | jjdelcerro | * @deprecated use getFeatureAttributeGetterAndSetter
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221 | 40435 | jjdelcerro | */
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222 | public FeatureAttributeGetter getFeatureAttributeGetter();
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223 | |||
224 | /**
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225 | * Sets the {@link FeatureAttributeGetter} that is used to update the
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226 | * presentation of a field.
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227 | * @param featureAttributeGetter
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228 | * the {@link FeatureAttributeGetter} to set.
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229 | 41335 | jjdelcerro | * @deprecated use setFeatureAttributeGetterAndSetter
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230 | 40435 | jjdelcerro | */
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231 | public void setFeatureAttributeGetter(FeatureAttributeGetter featureAttributeGetter); |
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232 | 41335 | jjdelcerro | |
233 | /**
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234 | * Gets the attribute emulator associatted {@link FeatureAttributeEmulator} to this attribute.
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235 | * @return
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236 | * a FeatureAttributeEmulator or null.
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237 | */
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238 | public FeatureAttributeEmulator getFeatureAttributeEmulator();
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239 | 43135 | jjdelcerro | |
240 | /**
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241 | * Return true if the attribute has an evaluator o an emulator.
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242 | * @return
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243 | */
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244 | public boolean isComputed(); |
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245 | 41335 | jjdelcerro | |
246 | 43739 | jjdelcerro | /**
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247 | * Return the store associated to this attribute descriptor.
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248 | *
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249 | * @return the FeatureStore of the attribute descriptor.
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250 | */
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251 | public FeatureStore getStore();
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252 | |||
253 | public FeatureType getFeatureType();
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254 | |||
255 | 40435 | jjdelcerro | } |